I have a Shawn Lane Excalibur and I've noticed when I'm playing on the lower frets (1st - 5th) I am experiencing a clicking noise coming from near the nut / zero fret . It looks like the zero fret is a bit loose and when I am bending or vibrato on the D or G string the zero fret segment seems to move causing this clicking noise . Is this normal and can anyone offer any solution ?? I have already ordered some more zero fret segments so hopefully changing them will fix the issue but I am worried the slot has become loose ??